\Chris"ten*dom\, n. [AS. cristend?m; cristen a
Christian + -dom.]
1. The profession of faith in Christ by baptism; hence, the
   Christian religion, or the adoption of it. [Obs.] --Shak.

2. The name received at baptism; or, more generally, any name
   or appelation. [Obs.]

         Pretty, fond, adoptious christendoms. --Shak.

3. That portion of the world in which Christianity prevails,
   or which is governed under Christian institutions, in
   distinction from heathen or Mohammedan lands.

         The Arian doctrine which then divided Christendom.
                                               --Milton

         A wide and still widening Christendom. --Coleridge.

4. The whole body of Christians. --Hooker.